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Replacement for Hexavalent Chrome

I'm researching on multilayers protective-decorative nickel-chromium. Due to the environmental problems of hexavalent Cr, it have been replaced by using instead, trivalent Cr. However it's known that worldwide there are alloys such as Tin/Cobalt, Tin/Nickel, etc as replacement for Hexavalent Cr. It's possible to use pulse plating to make this kind of alloy? Could you send me information about it? (papers, patent numbers, etc)

Thanks a lot.

Omar H [last name deleted for privacy by Editor]
University - Puerto Ordaz, Bolivar, Veneuela
2003

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I seem to recall from my university days that researching involves searching.

Ken Vlach [deceased]
- Goleta, California
Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2003

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Although chromium plating is often done from "home-brew", most electroplating, including trivalent chromium, tin/cobalt, and the other replacements are done from proprietary solutions. So you could start with suppliers like Atotech, CST Surtec, and Macdermid for this.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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Ed. note: You may want to hear "The Lost Art of Tin-Nickel Plating".